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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.myfaces.orchestra.viewController;
20  
21  /**
22   * Each view controller configured with the constructor will be asked to map the given viewId.
23   * The first one not returning NULL wins. 
24   * <p>
25   * As an example, this can be configured to first try a mapper that converts the viewId to
26   * a beanname, then if that fails to find a match try a mapper that uses class annotations
27   * to find an appropriate bean.
28   */
29  public class CompositeViewControllerNameMapper implements ViewControllerNameMapper
30  {
31      private final ViewControllerNameMapper[] viewControllerNameMappers;
32  
33      public CompositeViewControllerNameMapper(ViewControllerNameMapper[] viewControllerNameMappers)
34      {
35          this.viewControllerNameMappers = new ViewControllerNameMapper[viewControllerNameMappers.length];
36          System.arraycopy(
37                  viewControllerNameMappers, 0, 
38                  this.viewControllerNameMappers, 0,
39                  viewControllerNameMappers.length);
40      }
41  
42      public String mapViewId(String viewId)
43      {
44          for (int i = 0; i<viewControllerNameMappers.length; i++)
45          {
46              String beanName = viewControllerNameMappers[i].mapViewId(viewId);
47              if (beanName != null)
48              {
49                  return beanName;
50              }
51          }
52  
53          return null;
54      }
55  }